Use colrm to remove columns from a text file in bash

The colrm command is a simple little command that removes columns from standard input before displaying them on the screen (or piping the text into another file). To use, simply cat a file and then pipe it to colrm followed by the start and then stop in $1 and $2. For example, the following would only list the first column of a text file called testfile:

cat testfile | colrm 2

Not providing a second column in the above command caused only the first column to be displayed to the screen. You could pipe all but the second and third columns of a file to another file called testfile2 using the following: